I think I posted this in another related thread. I've tried the Kenko 1.4x TC on the Tokina FE with a Canon 400D. AF seems OK. Image looks fine through all focal lengths. Would like to try it u/w but will have to devise a long focus ring. Less luck with the 2.0x Kenko TC. Need to manual focus as AF won't lock (or rarely).

No aliens, just a "Dive into History Day" at world famous Weeki Wachee springs in Florida. This was a super popular spot in the 1950 - 1970s until Disney World attracted Florida vacationers. They have their famous "Mermaid" underwater shows which were pioneered by Newt Perry, a former Navy diver I believe.....

Some real old classic underwater films were partially shot here, too. Creature from the Black Lagoon (and Ricou Browning, who played the creature in the underwater scenes) still lives in this area of northern Florida. I hoped to meet him but he wasn't there

The Cousteau suited diver is Ryan Spence (www.flashbackscuba.com) who is documenting and collecting Cousteau memorabilia. He even has a suit worn by Jacques Cousteau!! The helmet divers were friends trying a historial dive guy who owns several types of diving helmets. All total a very cool photo op for me.

Well I received my Tokina 10-17 today ( $478.99 including shipping at Tri-State). I felt kind of guilty because it's my first non-Nikon lens except for my Kenko 1.4 TC.So I had to quickly do some comparison tests with the 10.5 and 16mm Nikon lenses. I quickly printed some test charts and pasted them together. Not too sophisticated lighting wise, and don't pay any attention to the resolution numbers, but bottom line is that I cannot see any (significant) difference. I almost wanted the Nikons to be better, but I cannot see it. I'll do some more tests this weekend. If the 10-17 pans out underwater for me, the 10.5 and 16 may be headed to eBay.Observe for yourself, anybody see anything that I don't?http://homepage.mac....ikon/index.html

Well, my Tokina 10-17 finally turned up today, just as I am packing foir a trip tomorrow. The S&S 18-35 zoom ring went on like a dream once I took off the rubber ring from the lens and added the S&S grippy stick-on surface that came with the zoom ring. Problem Is I couldn't get a SX extension ring today so do I take the Tokina with me? Will it focus in the 8" acrylic or 7" optical glass port? It does look a bit protruding.

Anyone tried it without an extension ring? My 40mm is obviously too long.

I buy my own photographic kit. Diving equipment manufacturers and diving services suppliers get even-handed treatment from me whether they choose to advertise in the publications I write for or not. All the equipment I get on loan is returned as soon as it is finished with.Did you know you can now get Diver Mag as an iPad/Android app?